JP2576090Y2 - Knob mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a knob mounting structure.
More specifically, the present invention relates to a knob mounting structure for a knob which is mounted on an end of a rotation shaft related to an operation of an operation shaft such as a volume or an adjustment shaft exposed to the outside of a housing in an electronic device or an electric device.

[0002]

2. Description of the Related Art Conventionally, a knob of this kind is configured such that a part of an operation shaft or an adjustment shaft thereof is protruded from an operated device or a member to be adjusted disposed in an equipment housing to the outside of the housing in advance. It is configured to be fitted to the end by fitting. Since such a knob is generally operated with a fingertip of a person and is mounted on a rotating shaft that does not require much torque, the knob itself is made of a structure and a material capable of withstanding such torque. In recent years, it has been molded with a resin-based material or the like.

FIGS. 3 to 5 show such a conventional knob mounting structure. In FIG. 3, reference numeral 10 denotes the knob, reference numeral 11 denotes, for example, a member to be adjusted on the side on which the knob 10 is mounted, reference numeral 12 denotes the adjustment shaft (rotation axis), and the member to be adjusted 11 is provided in a casing (not shown). It is fixed, and the end of the rotating shaft 12 is exposed outside the housing. In addition, the knob 1 which becomes resin molding etc
Reference numeral 0 denotes a socket which can be mounted at its center. 10A is a shaft mounting hole of the knob 10, 10B is a mounting hole 10
In the state where the rotary shaft 12 is fitted to A, a set screw hole 13 for restraining idling due to bidirectional sliding, and 13 is a screw hole 10
A set screw to be screwed into B. On the other hand, at the end of the rotating shaft 12, a cutting groove 12 </ b> A for a driver is formed in order to finely rotate the knob 10 before fixing the knob 10 to the rotating shaft 12 to position the rotating position.

In the knob mounting structure configured as described above, after the rotary shaft 12 is positioned at a predetermined rotary position, the distal end of the rotary shaft 12 is pressed into the mounting hole 10A of the knob 10, and accordingly. Then, the set screw 13 is screwed into the set screw hole 1
The knob 10 can be fixed to the rotation shaft 12 by screwing the screw 10 into the screw shaft 0B and engaging the screw tip with a stop hole (not shown) on the rotation shaft 12 side.

FIGS. 4 and 5 show another conventional example. FIG. 4 shows a male spline portion 12C formed at the tip of a rotating shaft 12. FIG.
Is press-fitted into the female spline portion 10C on the knob 10 side to perform serration coupling. FIG. 5 shows a cutout notch 12D formed at the tip of the rotating shaft 12 and a mounting hole 10D on the knob 10 which is shaped to match the notch 12D. This is an example in which a fixed state is maintained by press-fitting into the mounting hole 10D by fitting both.

[0006] In addition to the conventional examples described above, there are many known knob mounting structures in which these are appropriately combined.

[0007]

However, among the conventional examples described above, the one shown in FIG. 3 is troublesome in that the relative positioning between the rotary shaft for fixing and the knob is troublesome.
Each time it has to be fixed with a set screw, which is troublesome. Further, in the conventional example as shown in FIGS. 4 and 5, although the attachment is relatively easy, the attachment is likely to be loosened, and there is a possibility that it will come out as long as it is not required by an adhesive or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a knob mounting structure which eliminates the above-mentioned conventional drawbacks, can be mounted on the end of the rotating shaft with one touch, and does not easily come off. .

[0009]

According to the present invention, there is provided a knob mounting structure which is formed on an engaging portion formed at an end of a rotating shaft related to operation of a device and a knob mounted on the rotating shaft. A cylindrical socket portion having an inner diameter smaller than the outer diameter of the rotating shaft, a slit formed in the socket portion along the axial direction thereof, and the socket portion elastically deformable in a radial direction; Formed on the inner surface of the
A pair of locking grooves extending along the axial direction, the engagement portion and the pair of locking grooves being engaged with the socket portion inserted into the rotation shaft, and the rotation shaft and the socket And a locking member held between the first and second parts.

[0010]

According to the present invention, the locking member is engaged with the engaging portion formed at the end of the rotating shaft, and the locking member is matched with the pair of locking grooves formed in the socket portion. When the socket portion is inserted into the rotating shaft in a state in which the socket portion is elastically deformed, the socket portion is pushed outward in the radial direction, and the locking member is engaged with the engaging portion of the rotating shaft and a pair of locking grooves of the socket portion. Is held between the rotating shaft and the socket portion in a state of being engaged with the socket. As a result, due to the elastic force of the socket part inward in the radial direction,
The knob is integrally fitted to the rotation shaft.
Further, the rotational force applied to the knob is reliably transmitted to the rotating shaft via the locking member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Note that, here too, the structure of the knob 1 according to the present invention is shown in cross-section for easy understanding. Such a knob 1 is desirably formed of a resinous material having elasticity, and is preferably inexpensive and electrically insulated. Reference numeral 2 denotes a U-shaped member made of an elastic metal such as steel wire, which engages with both the rotating shaft 12 of the member to be adjusted 11 and the knob 1 to function as a detent and also functions as a stopper. Member (hereinafter simply referred to as a locking member).

That is, the locking member 2 has a linear portion 2A which engages with the cut groove 12A at the end of the adjusting shaft 12, and is bent from the linear portion 2A in the circumferential direction so as to extend along the inner surface of the socket portion 3 of the knob 1. And a locking arm 2B that engages with a locking groove 3A (see FIG. 2) provided in the axial direction. In the present embodiment, two pairs of locking grooves 3A are formed to maintain a 90 ° angle with each other so that the knob 1 can be selected coaxially with respect to the rotation direction of the rotation shaft 12 so as to be selectable in two directions. However, at least one pair of the locking grooves 3A may be provided, and a plurality of pairs may be formed. 3B is a slit provided in the axial direction of the socket part 3, and 3C shown in FIG.
And a fixing portion for protruding from the bottom of the lock member 2 to keep the locking member 2 engaged with the incision 12A.

Further, in the pair of locking grooves 3A as in the present embodiment, the vicinity of one locking groove forming portion on the end face of the socket portion 3 is cut one step lower to form a stepped portion 3D. When the locking member 2 is locked by using the locking groove 3A by using the attached portion 3D, the case where the locking groove 3A in the other direction is used is distinguished from the case where the locking groove 3A is used in one direction. I have. Further, the locking member 2 may be, for example, a plate-shaped member shown in FIG. 1 instead of the U-shaped member shown in the present embodiment. However, in this case, it is desirable to make the cutting depth of the cutting groove 12A provided on the rotating shaft 12 side relatively large.

In mounting the knob 1 on the rotation shaft 12 such as the adjusting shaft by the above-described knob mounting structure, first, the linear portion 2A of the locking member 2 is fitted into the cut groove 12A of the shaft 12. In addition, the parallel locking arm 2B is arranged along the shaft 12, and the locking arm 2B is fitted into a pair of locking grooves 3A provided in the socket portion 3 of the knob 1 so that the shaft 12 is
Into the socket 3. In this case, at least one of the spring property of the locking member 2 itself and the elasticity obtained through the slit 3B acts on the socket portion 3, so that the knob 1 and the rotating shaft 12 are securely engaged. In addition, it is possible to prevent the knob 1 from slipping out of the rotating shaft 12 due to the frictional force of the engaging portion due to these spring properties.

In the above-described embodiment, the linear portion 2A of the locking member 2 is engaged by using the driver operating notch 12A formed at the end of the rotary shaft 12. The application of the present invention is not limited to such locking means. As a locking member, a part thereof is fastened to the rotating shaft in a one-touch manner, and when the socket is press-fitted into the socket, the inner surface of the socket is removed. Any configuration may be used as long as it is configured to be elastically locked in the locking groove provided in.

[0017]

According to the knob mounting structure of the present invention, while the engaging portion is formed at the end of the rotating shaft related to the operation of the device,
A tubular socket having an inner diameter smaller than the outer diameter of the rotating shaft is formed on a knob attached to the rotating shaft, and the socket is elastically deformable in the radial direction along the axial direction of the socket. A slit is formed, and a pair of locking grooves extending along the axial direction are formed on the inner surface of the socket portion at intervals, and the engaging portion and the pair of locking grooves are formed with the socket portion inserted in the rotating shaft. Is held between the rotation shaft and the socket portion, so that the knob can be integrally fitted to the rotation shaft very easily with one touch. Moreover, the elastic force of the socket portion and the rotation preventing mechanism using the locking member can reliably prevent the knob from coming off or loosening with respect to the rotating shaft, and can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of the configuration of the present invention.

FIG. 2 is a perspective view showing details of the configuration of a knob and a locking member according to the present invention.

FIG. 3 is an exploded perspective view showing a configuration of a conventional example.

FIG. 4 is an exploded perspective view showing the configuration of another conventional example.

FIG. 5 is an exploded perspective view showing a configuration of still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Knob 2 Locking member 2A Linear part 2B Locking arm 3 Socket part 3A Locking groove 3B Slit 3C Fixing part 11 Adjustable member 12 Adjusting shaft (rotating shaft) 12A Cutting groove

Claims (1)

(57) [Scope of request for utility model registration] 1. A shape is formed at an end of a rotation shaft involved in operation of a device.
The engaging portion formed and the knob formed on the rotating shaft and the rotating shaft
A cylindrical socket portion having an inner diameter smaller than the outer diameter of the socket, and formed in the socket portion along the axial direction thereof;
A slit formed on the inner surface of the socket portion so as to be elastically deformable in a radial direction, and formed along the axial direction.
Wherein a pair of locking grooves, the socket portion engaged with said pair of locking grooves and the engaging portion in a state of inserting the said pivot axis, said pivot axis extending I
Knob mounting structure characterized in that e ingredients and a locking member that is held between the socket portion.